private void GetDataStudent(HttpContext context)
{
var ds = new DataSet();
var courseId = context.Request["coId"];
var page = Convert.ToInt32(context.Request["page"]);
var rows = Convert.ToInt32(context.Request["rows"]);
var startIndex = (page - 1) * rows + 1;
var endIndex = startIndex + rows - 1;
var stuBll = new BLL.Student();
var questionbll = new BLL.Questionnaire();
var num = stuBll.GetRecordCount("");
// ds = questionbll.GetCourseStudentState(courseId);
ds = questionbll.GetCourseStudentStateListByPage(courseId,"ck",startIndex,endIndex);
var str = JsonConvert.SerializeObject(new { total = num, rows = ds.Tables[0] });
context.Response.Write(str);
}